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Cabin air is renewed at a high rate form the outside. It will contain fumes when the airplane is on the ground, because airport air contains fumes. The vast ma
by paol 6y ago
Cabin air is renewed at a high rate form the outside. It will contain fumes when the airplane is on the ground, because airport air contains fumes.
The vast majority of the time the airplane is at cruising altitude, though. That air is as clean as you are going to get on planet earth.
- mint2 6y ago*Except during fume events. Which are basically not tracked or measured well.
- bloopbloo 6y agoI used to think the same thing, then it was pointed out to me that most air comes from engine bleed air. That is, it’s air that has been compressed by the engine and can contain aerosolized engine oil. Oil that has been heated to really high T (that’s really bad). There are standards to filter it before it goes into the cabin. Some aircraft (Dreamliner?) have separate pumps to avoid using bleed air (improves engine efficiency). But even that pump will need lubricating. However for that pump you can probably use a safer oil and also not expose it to extreme heat.